While helping fix up the old house their cousins have bought, the Aldens hear stories about its being haunted and find evidence suggesting that there may be a ghost there.

The mystery of the singing ghost: The Boxcar Children are helping to fix up the house that their cousins have bought. But the house seems to be haunted by a ghost who sings! Will an old diary explain the house's secrets? The mystery of the mummy's curse: Strange things have been happening at the Greenfield Museum ever since an Egyptian mummy arrived for a special exhibit. Could an ancient curse be to blame for all the bad luck? The mystery of Skeleton...